VRRP in JetBox
Virtual Interfaces With Keepalived
When networks become more and more complex, redundancy of networks is important.
Routers and firewalls of local sites provide Internet and VPN connectivity to a center via Ethernet, wifi or 3G networks. The redundancy of routers or the backup between Ethernet, wifi and 3G network is critical and need to ensure the network reliability.
Keepalived provides interface failover and the ability to perform application-layer health checks. When these capabilities are combined with the Linux Virtual Server (LVS), a fault in an application will be detected by keepalived, and the virtual interfaces that are accessed by clients can be migrated to another available node.
Korenix JetBox series use keepalived SW package for VRRP redundancy, for detail setting, please refer to the JetBox SW user manual.
Applied models:
- JetBox9500/ 9400/ 5400 series
- JetCard5400
Keepalived for VRRP Redundancy
Virtual Router Redundancy Protocol (VRRP) is an IETF standard that provides a redundant router mechanism to increase the reliability of existing networks. The VRRP process provides dynamic failover of the forwarding responsibility to a Backup (secondary) router if the Master (primary) router becomes unavailable. VRRP provides the advantage of a single default path that has higher availability without requiring network devices to be reconfigured if a failure occurs.
keepalived implements an independent VRRPv2 stack to handle director failover. It can deal with the Linux Virtual Server (LVS) framework.
Please refer to Keepalived user manual for more details.
http://www.keepalived.org/documentation.html
VRRP in JetBox
The VRRP protocol provides rapid transition from Master to Backup to minimize service interruption.
One of the JetBox becomes the Master and the other becomes a Backup when the VRRP protocol starts up. Election of the Master is based on the configuration file. Both Master and Backup have identical Virtual IP Addresses.
Take JetBox9500 series for example. When Master becomes unavailable, traffic between JetBox 9500 #1 and JetBox 9500 #2 is interrupted. Then JetBox 9500#2 will take the place as Master.
